The bifurcated steel pipe is usually used int he hydro-engineering and other projects so that its developed surface is key to the design of project.
水利水电工程及其他工程中，经常使用钢岔管，岔管的展开是工程设计的一个重要课题。
The bifurcated steel pipe is usually used int he hydro-engineering and other projects so that its developed surface is key to the design of project.
水利水电工程及其他工程中，经常使用钢岔管，岔管的展开是工程设计的一个重要课题。
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